Topic
Optical switch
About: Optical switch is a research topic. Over the lifetime, 28538 publications have been published within this topic receiving 351176 citations.
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TL;DR: A novel, hardware-compressive architecture for broadband and continuously tunable integrated optical true-time-delay beamformers for phased array antennas is proposed and experimentally demonstrated, and the first demonstration of an integrated beamformer where the periodic response of ORRs is exploited to process signals from different antenna elements, simultaneously, using a single delay line is demonstrated.
Abstract: A novel, hardware-compressive architecture for broadband and continuously tunable integrated optical truetime- delay beamformers for phased array antennas is proposed and experimentally demonstrated. The novel idea consists in employing the frequency-periodic response of optical ring resonator (ORR) filters in conjunction with on-chip wavelength division multiplexing (WDM), in order to create multiple signal paths on an individual beamformer channel. This novel idea dramatically reduces the network complexity and, in turn, its footprint on the wafer. This allows the integration of an unprecedented number of delay channels on a single chip, ultimately overcoming the main limitation of integrated optical beamformers, that is, the difficulty to feed antenna arrays with many elements using a single integrated chip. A novel beamformer has been realized based on this technique, using the ultra-low-loss TriPleXTM waveguide platform with CMOScompatible fabrication equipment, and its functionality is demonstrated over an instantaneous bandwidth from 2 to 10 GHz. This result, at the best of our knowledge, represents at the same time the record instantaneous bandwidth (8 GHz) for an optical beamformer based on optical ring resonators (ORR), and the first demonstration of an integrated beamformer where the periodic response of ORRs is exploited to process signals from different antenna elements, simultaneously, using a single delay line.
86 citations
Patent•
26 Nov 2012TL;DR: In this article, a switching device includes multiple interfaces and a switch fabric, which includes switch integrated circuits arranged in a number of stages, and data traffic received at the interfaces is selectively assigned to different ones of the virtual switch planes.
Abstract: A switching device includes multiple interfaces and a switch fabric. The switch fabric includes switch integrated circuits arranged in a number of stages. Multiple virtual switch planes may be implemented in the switch fabric. Data traffic received at the interfaces is selectively assigned to different ones of the virtual switch planes.
86 citations
TL;DR: It is shown that the speed requirements can be met (for nearly all circuits) by today's standard technologies, provided that appropriate circuit concepts are used and the circuits are designed carefully.
Abstract: Basic silicon bipolar ICs for use in systems operations at bit rates of about 2.5 Gb/s are described. Examples are multiplexers, demultiplexers, amplifiers, decision circuits, etc. It is shown that the speed requirements can be met (for nearly all circuits) by today's standard technologies, provided that appropriate circuit concepts are used and the circuits are designed carefully. Applying today's advanced bipolar technologies with self-aligning polysilicon processes, bit rates well above 10 Gb/s are achievable in several cases. >
86 citations
Patent•
28 Feb 2002
TL;DR: In this article, an optical pulse stream comprising a plurality of return-to-zero optical pulses is prepared by modulating a phase of light output by an optical source to encode data from a data source.
Abstract: The present invention relates to a method for transmitting data. An optical pulse stream comprising a plurality of return-to-zero optical pulses is prepared by modulating a phase of light output by an optical source to thereby encode data from a data source. The light of the optical pulse stream has a wavelength. The optical pulse stream is transmitted along an optical fiber of an optical network. Optical pulse streams of the invention enhance transmission performance at least in part by reducing noise at the receiver caused by fiber non-linearities.
86 citations
Patent•
21 Dec 2001TL;DR: In this paper, a reflective optical modulating element (DMD) is proposed to suppress undesired scattered light and leaking light so as to improve the optical function and reliability, and a nonconductive film 40 is formed to cover a portion or all of the first metal layer and to cover underlying film (insulating film) to bury hole formed on the surface of the third metal layer.
Abstract: To suppress undesired scattered light and leaking light so as to improve the optical function and reliability. In this DMD, as the address circuit of one cell, SRAM 12 is formed monolithically on the principal surface of silicon substrate 10 , and, on said SRAM 12 , reflective digital optical switch or optical modulating element 16 is formed monolithically as one cell made of three layers of a metal, such as aluminum, via oxide film 14 . Each reflective optical modulating element 16 has bias bus 18 and yoke address electrodes 20, 22 as the first metal layer, torsional hinge 24 , hinge supporting portions 26, 28 , yoke 30 , and mirror address electrodes 32, 34 as the second metal layer, and mirror 36 as the third metal layer. Optical absorptive and nonconductive film 40 is formed to cover a portion or all of the first metal layer and to cover underlying film (insulating film) 14 . In addition, said film 40 is formed to bury hole formed on the surface of the third metal layer.
86 citations